Finding the Fourth Proportional to 4,978.30, 7,467.42 and 1,280.54

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.30 : 7,467.42 = 1,280.54 : x
2. Step 2: Convert to fraction form
   4,978.30/7,467.42 = 1,280.54/x
3. Step 3: Cross multiply
   4,978.30x = 7,467.42 × 1,280.54
4. Step 4: Simplify right side
   4,978.30x = 9,562,330.01
5. Step 5: Solve for x
   x = 9,562,330.01/4,978.30
6. Step 6: Final answer
   x = 1,920.80